Number | Name | Date | Kind |
---|---|---|---|
2160058 | Covert | May 1939 | |
3091641 | Sweeney | May 1963 | |
3235515 | Taylor | Feb 1966 | |
3442951 | Thirion | May 1969 | |
3520933 | Adam et al. | Jul 1970 | |
3597438 | Brake | Aug 1971 | |
3873621 | Kreevoy | Mar 1975 |
Number | Date | Country |
---|---|---|
1,182,562 | Feb 1970 | UK |
Entry |
---|
Wagner et al., Synthetic Organic Chemistry, John Wiley & Sons, Inc., N.Y., pp. 662 & 663 (1953). |